The Sourness of Faith

In Kitabul Iman, in the book of faith, there's the sub- chapter, Bab halawat al Iman. Anas ibn Umar alikrul al-A'lalah narrates. If a person has these three qualities, then they have tasted the sweetness of faith. Hadi knows what he's doing, which narrator of the hadith he's choosing here as he's putting this together. The people were willing to accept a change from the prophet Salallahu Alaihi wa Salam.